SEMICONDUCTOR DEVICE FOR SWITCHING POWER SUPPLY CONTROL

PROBLEM TO BE SOLVED: To provide a semiconductor device for a switching power supply control, capable of preventing a switching power supply unit from being destroyed, by stopping switching operations and keeping the stopping conditions if no acquirement of a feedback signal for controlling the swit...

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Bibliographic Details
Main Author YAMASHITA TETSUJI
Format Patent
LanguageEnglish
Published 19.09.2003
Edition7
Subjects
APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS
CONTROL OR REGULATION THEREOF
CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
ELECTRICITY
GENERATION
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Summary:PROBLEM TO BE SOLVED: To provide a semiconductor device for a switching power supply control, capable of preventing a switching power supply unit from being destroyed, by stopping switching operations and keeping the stopping conditions if no acquirement of a feedback signal for controlling the switching operations of the switching device causes no flow-out of current from a control terminal. SOLUTION: This semiconductor device includes a control terminal open protective circuit 10, which makes an overvoltage protective circuit 8 operate by raising the voltage of the control terminal 26 to a prescribed voltage value and keeps the stopping condition of switching operations with the overvoltage protective circuit 8. COPYRIGHT: (C)2003,JPO
Bibliography:Application Number: JP20020066239